Grain drill attachment for disk harrows



May 26, 1936. c. E. uNDERwooD GRAIN DRILL ATTACHMENT FOR DISK HARROWS Filed Aug. l5, 1935 gmc/whom ZWZS E wide/www1 l W w Patented May 26, 1936 UNITED STATES PATENT GFFICE GRAIN DRILL ATTACHMENT FOR DISK HARROWS 1 Claim.

This invention relates to a novel combination with a disk harrow of a grain drill, and has for its principal object the utilization of the power generated by a revolving disk harrow to operate a seed dropping means or grain drill, and providing means for dropping the seed or grain in the furrows formed by the harrow disks and covering them in one operation.

The more specific objects and advantages will in part be pointed out hereinafter and otherwise become apparent from a consideration of the description following taken in connection with accompanying drawing illustrating an operative embodiment.

In said drawing:-

Figure 1 is a rear end elevation of a harrow having the improved grain drill attachment in place thereon;

Figure 2 is a. longitudinal sectional view taken on the line 2 2 of Figure 1;

Figure 3 is a view taken substantially on the line 3-3 of Figure 2; and

Figure 4 is a detail section taken substantially on the line 4-4 of Figure 3.

Referring specifically to the drawing, Ill generally designates a grain drill which is to be taken as conventional since it may be of any desired make, size or proportion, It has a frame with side bars I I to which a suitable hitch is made and cross bars at I2. An axle or shaft I3 is journaled in brackets I4, suitably suspended from the frame and along the shaft or shafts I3, a harrow element in the form of disks I5 are strung.

In carrying out the invention, a hopper I6, preferably one for each of the -series of harrow disks I5, is removably mounted on the frame I2 as by means of brackets I1 bolted at I8 to the hoppers and at I9 to the frame I2. Each hopper has a series of discharge openings 20 in its bottom wall and depending from each opening is a dropper or deposit tube 2|, the lower ends of which are preferably slightly curved as shown to conform to the convex sides of the disks I5, adjacent which they are disposed. As the harrow is drawn along, the disks I5 on the left hand shaft I3 in Figure 1 will throw the dirt to the left while providing furrows, while the disks I5 on the right hand shaft I3 will blow the dirt to the right while providing furrows. At the same time the tubes 2| will drop the seeds from the hoppers before the covering of the furrows. The furrows are not covered by the same disks which provides them but such furrows are covered by the disk next adjacent the disk which provided the furrow. It will thus be seen that were it not for the disks 22, the innermost furrows would not be covered and the seed deposited therein through the adjacent tubes 2| would be wasted.

In order to cover the seed dropped by the two central dropper tubes 2|, auxiliary harrow disks 22 of the dished type like those at I5, are secured to a shaft or axle 23, which in turn is journaled in brackets 24, fastened one to each of the hoppers I6 or other parts. A

Said hoppers I6 are of conventional form, having covers at 25, hinged in place at 26 and having within the same, distributors 21 provided with any suitable number of blades 28, for instance four as shown, and each distributor rhaving a shaft 29 suitably journaled in the hoppers and exteriorly thereof equipped with sprocket wheels 3|] over which a sprocket chain 3| is trained, and Which in turn is trained over a sprocket wheel 32 fastened to the shaft I3. Thus as the harrow is drawn along, the shafts I3 will be rotated by the disks whose motion will be imparted to the shafts 29 and distributors through the medium of the sprockets 30 and 32 and chain 3|.

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

What is claimed is:-

In combination with a harrowing implement having a frame, axles thereon and disks on said axles, hoppers on said frame, each hopper having seed discharge openings, distributors within the hoppers associated with said openings, shafts for said distributors having sprocket wheels thereon, sprocket wheels on the first mentioned shafts, sprocket chains trained over the sprocket wheels, dropper tubes depending from the openings of said hoppers vat the convex sides of the disks, auxiliary disks each having its concaved side facing the innermost dropper tubes so as to function to cover the seed dropped by such innermost tubes, and means depending from the frame mounting said auxiliary disks between said innermost dropper tubes.

CURTIS E. UNDERWOOD. 

